Train-lighting apparatus



Dec. 23, 1930. w. A. PITT 1,786,401

TRAIN LIGHTING APPARATUS Filed March 6, 1929 ZSheets-Sheeil l //v VEA/TaR W/LL//m mex/mum PIT?? Dec. 23, 1930. w. A. PITT TRAIN LIGHTINGAPPARATUS 'Filed March 6, 1929 2 Sheets-Sheet 2 HTTRNE/ Pateted Dec. 23,1930 UNITED STATES PATENT orifice WILLIAM ALEXANDER rrr'r, 0E MONTREAL,ouEBEc, CANADA, AssIeNoR 0F FoRTY- NINE PER CENT 'ro FRANK SUMMER, onNEW YORK, N. Y.

TRAIN-LIGHTING APPARATUS Application filed March 6,

This invention relates to apparatus for train lighting and particularlyto the type in which a generator is mounted beneath the car body and isdriven through suitable gear a' mechanism by one of the truck axles.

The object of my invention is to provide an improved form oftransmission mechanism, and of the suspension to the car body of suchmechanism..

A further object is toprovide a means of mounting the driving gear onthe truck axle to ensure its true axial position.

A Vfurther object is to provide improved bearings on the driving gearfor the transmission casing.

Further objects will be set forth hereinafter.

The invention consists in the construction and arrangement of thevarious parts according to the description following, as illustrated bythe dra-wings and as covered by the claims.

Reference is made to the accompanying drawings in which Fig. 1 is a sideview of the device showing its suspension and connection to a lightinggenerator. l

Fig. 2 is a plan view showing in dotted lines change of position due toaxle movement.

Fig. 3 is a top view of gear mechanism with the casing removed.

Fig. 4 is a similar view with bevel gear drive.

Fig. 5 is aA vertical section on the line 5 5 of Fig. 1.

Fig. 6 is a view of the suspension sprirfg.

In Fig. 1 the under frame 20 ofthe car l40 body 2 has a U shaped bracket70 secured to its under side. The bracket 7 0 has a central verticalpivoting pin 71 which pivots the end of acantilever spring 7 within thebracket 70. The sides of the bracket 70 are clear of the spring 7 inorder to allow for horizontal pivoting of the spring 7.

The .truck axle 4 is provided with a cast Babbitt bearing surface 40forming a sleeve about its center portion, the surface of which is casttrue to the axis of rotation of the axle the boltof vthe `shackle 81 in`which is suspended the-extension portion 6l of the trans- 1929. serialNo.5 344,875.

4, the axle 4 in most cases being rough turned and ynot true.

. The split transmission gear 9 is provided with'arbroad sleeve93adap'ted to be clamped 'aboutthe Babbitt sleeve 40 ensuringthat the fgear 9fwill rotate true tothe axis of rotation of thefaxle 4. The sleeve93 has two outer bearing s`urfaces^930 and 931 on either side of thegear 9. The transmission casing 6 has .corresponding bearing surfaces,which when :the casing is secured-about the gear 9 and sleeve93 ensuresa steady, true running transmission.- InV Figure 4 a variation ofthegear andfcasing is shown. The gear 9 is a direct lbevel drive to theshaft 50 and thesleeve 93 51s provided with `a` ridge 94 to which the`casing 6 conforms to take up end thrust.

The forward end of the transmission .casingfcarries the shaft 91 onwhich is mountgives a degree of rigidity to that portion of the Springbetween the link 7 2 and its seat in '.the bracket `70 thereby providinga bracket .efect. A screwsleeve Shasa forked upper end 82 which-- isconnected to the spring 7 by .a bolt passing through the eyeat itsflexible end. i4-screw eye bolt80extends downwards from the sleeve 8 andconnects with mission Vcasing-G. rlhe screw sleeve 8 and eye bolt 8Qprovide for the Vadjustment of the casing 6 and drive shaft 50 with thespring 7. lt will be seen from the foregoing that a simple and eflicienttrain lighting apparatus is provided in which the defects of priorapparatus is overcome due to the mounting of the transmission gear on asleeve of babbitt which has been cast on the'axle true to the CIL- axisof rotation. The broad sleeve of the gear providing extended bearingsurfaces for the transmission casing, ensuring a steady drive to thegenerator free from vibration and excessive Wear.

The simple suspension means provides for the degree of flexibilityrequired for this type of apparatus and takes up any torsional stressdue to variation of angle of the transmission with the car body. ThepivotingV of the spring on its seat allows the end of the spring toapproximately swing on the same arc as the transmission casing atitsconnection With the end of the spring, when the car truck is roundingcorners.

What I claim is:

l. In a train lighting apparatus the combination of a generator mountedon the car body, a transmission gear drive for rotatively connecting thecar axle to the generator, and suspension means for the drive comprisinga leaf spring pivotally mounted on a bracket on the car body andconnected at its flexible end with the drive.

2. In a train lighting apparatus, the combination of a generator mountedon the car body, a transmission gear drive for rotatively connecting thecar axle to the generator, and suspension means for the drive comprisinga bracket arm in the form of a leaf spring pivotally mounted on abracket on the car body and connected at its flexible end With thedrive.

3. In a train lighting apparatus, the combination of a generator mountedon the car body, a transmission gear drive for rotatively connecting thecar axle to the generator, and suspension means for the drive comprisinga bracket arm in the form of a leaf spring pivotally mounted on abracket on the car body and adjustably connected at its flexible endwith the drive.

4. In a tra-in lighting apparatus, the combination of a generatormounted on the car body, a transmission gear drive mounted on an axiallytrued Babbitt sleeve on the car axle for rotatively connecting the caraxle to the generator, and suspension means for the drive comprising aleaf spring pivotally mounted on a bracket on the car body and connectedat its flexible end With the drive.

5. In a train lighting apparatus, a generator drive suspension meanscomprising a bracket arm in the form of a cantilever spring pivoted tothe car body, having its major portion held rigid, and an adjustableconnection between its flexible end and the drive.

WILLIAM ALEXANDER PITT.

